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Modelowanie przemieszczeń poziomych w teorii Knothego-Budryka dla warunków LGOM

Niedojadło Z., Jura J., Stoch T., Matwij K.

Przegląd Górniczy

2014

T. 70, nr 8

157--164

Artykuł przedstawia wyniki kolejnych badań w zakresie oceny dokładności prognozowania wskaźników deformacji w warunkach LGOM przy wykorzystaniu wzorów i założeń teorii Knothego. Poprzednie analizy i ich wyniki wraz z podstawami teoretycznymi omówione zostały w artykule [16]. Przedstawianie jednak ogólnych wniosków wymaga analizy zróżnicowanego materiału obserwacyjnego, z różnych części danego terenu górniczego, uzyskanego z pomiarów na wielu liniach. Stąd kontynuacja rozważań, które dotyczą głównie zagadnienia poprawnego prognozowania przemieszczeń oraz odkształceń poziomych, zależnych m.in. od ustalenia właściwych wartości parametru B zwanego współczynnikiem odkształcenia poziomego.

This paper presents the results of subsequent research concerning the accuracy assessment of deformation indicator prognoses in the GLCD conditions by means of formulas and assumptions of the Budryk-Knothe theory. The previous analyses and their results together with the theoretical principles were discussed in paper [16]. However, the presentation of general conclusions requires the analysis of diversified observation material from various parts of the particular mining area, obtained from measurements made on numerous lines. Therefore, it constitutes a continuation of discussion concerning mainly the issue of adequate prognosis of displacements and horizontal deformations depending, inter alia, on the determination of proper values of parameter B, the so-called horizontal deformation coefficient.

Surveying support in geophysical methods

Matwij K., Matwij W.

Geology, Geophysics and Environment

2014

Vol. 40, no. 1

107

Traditional methods to identify the geological structure of the rock mass are based mainly on the analysis of cores from boreholes. Today, more and more often geophysical methods are introduced to support classical methods or completely replace them. One of the major advantages of this type of measurement is non-invasive analysis of the rock mass. Due to the nature of this type of geophysical measurements and calculations, they must be supplemented by surveying information. Gravimetry and microgravimetry are commonly used technologies to detect voids, located shallowly under the ground. They are based on the determination of changes in the vertical components of the force of gravity at a point. Determination of the value of gravity gives only apparent image of change. To be able to fully describe studied phenomenon we should also take into account the topographic correction of rock masses located close to the measured point. Modern geodetic measurement methods used to determine the digital terrain model with high precision allow increasing the quality of the results of the study. To register terrain over the caves, which were the subject of research, total station technology and terrestrial laser scanning were applied. This allowed to create a fully metric terrain model in form of a cloud of points. The accuracy of both methods can be determined at the level of several millimeters. To calculate the correction for the excavation created three-dimensional models of voids located under the surface. They were also used to control the data obtained from gravimetry. The conclusion of our study was that geodetic measurements are important elements of geophysical researches.